Rohde & Schwarz ESR3 EMI Test Receiver

The Rohde & Schwarz ESR3 EMI Test Receiver combines EMI testing and spectrum analysis in a single instrument for EMC compliance validation. It delivers radiated and conducted emissions measurement across 9 kHz to 3.6 GHz, with optional extension to 10 Hz. The ESR3 executes measurements up to 6000 times faster than conventional EMI receivers through FFT-based time-domain scanning and real-time spectrum analysis spanning up to 40 MHz.

Its dual-input architecture accommodates pulse voltages to 450 V and pulse energy to 20 mWs, making it suitable for product development, certification, and field testing across automotive, aerospace, and industrial sectors.

Technical Specifications

• 9 kHz to 3.6 GHz standard; optional extension to 10 Hz


• Resolution bandwidth: 10 Hz to 10 MHz (–3 dB) in 1/2/3/5/10 steps


• EMI bandwidths per CISPR 16-1-1: 200 Hz, 9 kHz, 120 kHz (6 dB); 1 MHz (impulse)


• Optional MIL-STD-461/DO-160/ICNIRP bandwidths in decade steps (10 Hz to 1 MHz, 6 dB)


• Zero-span bandwidth: 40 MHz Detection and Demodulation:


• Receiver-mode detectors: Max. Peak, Min. Peak, Quasi-Peak, RMS, Average, CISPR average, CISPR-RMS


• AM and FM demodulation support Input Stages:


• Integrated 20 dB preamplifier with 16 fixed filters (35–200 MHz preselector)


• Optional 20 dB RF preamplifier (9 kHz to 7 GHz); gain 20–30 dB


• DANL: Typically –7 dBμV (with preamplifier, 500 MHz, 120 kHz BW); –168 dBm @ 1 Hz BW


• Max RF input (CW): 30 dBm with preamplifier off; 23 dBm with preamplifier on (RF atten ≥ 10 dB)


• 1 dB compression: +3 dBm nominal @ 0 dB attenuation; +10 dBm nominal @ 1 GHz Pulse Handling:


• Max pulse voltage: 150 V (Input 1), 450 V (Input 2) at RF atten ≥ 10 dB


• Max pulse energy: 1 mWs (Input 1), 20 mWs (Input 2) for 10 μs pulses Measurement Speed:


• FFT scan processes up to 30 MHz FFT segments in parallel


• Analyzer sweep time: 1 μs to 16,000 s (span = 0 Hz); 1 ms to 16,000 s (swept); 7 μs to 16,000 s (FFT)


• Time-domain display resolution: 50 μs


• Spectrogram, persistence, and frequency mask trigger modes

Key Features

• Ultra-rapid disturbance identification via FFT time-domain scanning


• Preselection with integrated preamplifier minimizes out-of-band interference


• Dual inputs handle high-energy pulses and conducted transients


• Meter time constants align with CISPR standards for repeatability

Typical Applications

• EMC pre-compliance and certification testing


• Radiated and conducted emissions measurement


• In-situ disturbance analysis during product development


• Transient and pulse characterization on automotive and avionics platforms

Compatibility & Integration The ESR3 accepts both AM/FM demodulated signals and raw RF inputs, enabling integration into automated test systems for rapid design iteration and regulatory compliance workflows.